single word requests - What do you call the part of a quantity that isn't the unit (e.g. the "5" in "5 inches")?

I am thinking "value" is close, but I also want to use the word "value" for the whole thing.

A value of 5 inches...

in which case the "value" should be broken into the "___" and the "unit".

An example sentence:

In my software, to represent the different distances unambiguously, I store the unit along with the ___.